Water purifier for a sink



FIG. 1 is a perspective view of a water purifier for a sink in accordance with my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a right side view thereof, the left side view thereof being a mirror image of the right side view;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom view thereof.

The broken line showing on the sides and bottom of the water purifier is for the purpose of illustration and forms no part of the claimed design. 

The ornamental design for a water purifier for a sink, as shown and described. 